Covering for textile machinery rollers



y 7, 1952 A. FREEDLANDER COVERING F OR TEXTILE MACHINERY ROLLERS FiledJan. 2, 1947 $70M ATTORNEYS INVENTOR ABRAHAM L. FREEDLANDER FIG. 6

Patented May 27, 1952 COVERING FOR TEXTILE MACHINERY ROLLERS Abraham L.Freedlander, Dayton, Ohio, assignor to The Dayton Rubber Company, acorporation of Ohio Application January ,2, 1947, Serial No. 119,789

. 3 Claims.

This invention deals with coverings for rollers as they are used intextile machinery, e. g. for spinning, drafting or the like apparatus,and in particular with aprons, cots and similar units.

Rollers used in textile machinery usually have a small diameter, and thecoverings therefore have to stand a high degree of curvature. It hasalways been difiicult to; make aprons, cots or similar roller coveringssufficiently flexible so that they fitsnugly such small rollers and atthe same time .to make these coverings rigid and resistant todeformation so that no traveling occurs.

It is an object of this invention to provide coverings for rollersoftextilemachinery which have a high degree of flexibility and atthe'sarne time a high resistance to deformation-causing stresses. I I

It is another object of this invention to provide coverings for rollersof'textile machinery which do not travel during use but remain on therollers during their entire service life.

It is still another object of this invention to provide coverings forrollers of textile machinery in which any frictional heat created on onesurface of said covering is not conveyed to the other surface thereof.

It is still another object of this invention to provide coverings forrollers of textile machinery which are relatively inexpensive.

These and other objects are accomplished by reinforcing the neutral axiszone of the coverings by means of fibrous glass material.

The invention will be more fully understood from the followingdescription taken in connection with the accompanying drawings, in-whichFigure 1 is an elevational view of a pairof rollers as they are used intextile machinery, one of said rollers being illustratedpartly in crosssection inorder to show the. construction of the covering thereon;

Figure 2 is a cross section on an enlarged scale of one of the rollersof Figure 1 taken along line 2-2 thereof;

Figure 3 is a perspective fragmentary view of a modified form ofcovering with parts thereof removed in order to show certain detailsmore clearly;

Figure 4 is a perspective view of a cable suitable for the reinforcementof the neutral axis zone of the covers of my invention;

Figure 5 is a perspective view of another modification of a cable as itmay be used to reinforce the neutral axis zone of the coverings of myinvention;

Figure 7 is a fragmentary perspective view of still another modificationof my invention.

Referring to the drawings in detail, and in particular to Figures 1 to2, reference numeral I0 designates an axle shaft on which two rollers ll and [2 are mounted. Each roller has a rubber covering [3 on itscircumference. The cover 13 comprises an inner compression section V I4,a neutral axis section [5, and an outer tension section 16. The neutralaxis section, in the instance illustrated in Figures 2 and 3, comprisestwo layers of longitudinally and parallelly extending glass cords [1.These cords I! are embedded in rubber or rubber-like composition. Thetension and compression sections are also formed of rubber materials.While any kind of rubber is suitable for the coverings of my invention,it is advantageous to use a softer and more cushioning composition forthe compression section and a harder and more resilient rubbercomposition for the tension section.

In Figure 3 a covering similar in structure to Figure 2 is illustratedwith the exception that cords Ila are shown arranged in staggeredrelationship instead of being superposed as are cords I! in Figure 2. InFigure 4, a cable is illustrated which may b used in the neutral axiszonein place of the cords ll. This cable 2| is formed of aplurality ofcords22, each of which again is built of short glass staples. Theshortglass staples provide for a relatively rough surface, a featurewhich enhances the bond of the reinforcing members with the rubbermaterial of the coverings;

Another modification of a cable, which also gave excellent results, isillustrated in Figure 5. There, plain glass cords l9 individuallycovered by a cushioning material 20, such as rubber, resin, or the like,are twisted into a cable 18. The individual coatings 20 provide for areduction of the friction between the glass cords of the cable and thusreduce breakage thereof and consequently damaging of the rubber layers.Moreover, the coatings 20 increase the bond between the glass and therubber of the neutral axis zone.

Another embodiment of my invention is illustrated in Figure 6. There,the compression section is designated with 23, the neutral axis sectionwith 24, and the tension section with 25. The neutral axis section isreinforced by independent individua1 glass fibers 25 of diiferentlengths; these fibers have been calendered into the rubber of theneutral axis zone so that they extend substantially parallelly to eachother and to the longitudinal axis of the covering.

This modification is even more flexible than those shown in the previousfigures due to the use of thinner and discontinuous glass fibers; yetthe resistance to deformation is still relatively high, since thestaples overlap with regard to their lengths.

In Figure 7 the compression section-is designated with the referencenumeral 21, the neutral axis section with 28, and the tension sec.- tionwith 29. There, the neutral axis section is reinforced by glass fiberswhich are matted into a blanket 30.

The various coverings of my invention are formed by building up thelayers consecutively on a mandrel, by then cutting the built up layersinto the width desired of the textile unit and then curing these unitsin a mold. During'vulcanization the rubber flows between and around thereinforcing elements and thus provides for a firm anchoragetherebetween.

Although the bond between the 'glasselements and the rubberissufiiciently high, it'is advantageous in some instances to apply acoating on the glass elements either of rubber material, resin, or othermaterials known to the art whereby the bond is'still increased.

In the case of using cords as the reinforcing elements, one layer'orseveral layers maybe used. If more than one layer is used'a staggeredarrangement may be chosen which arrangement is another means ofincreasing the resistance to deformation and of providing for a moreuniform distribution of the strength elements. The more layers of cordsor of other reinforcing elements are used, the thinner the individualmembers thereof may be'made. The thinner the individual glass membersare, the higher the flexibility will be; yet "the resistance, todeformation will not be reduced thereby.

All rubbers customary in the art-maybe used for the article of myinvention. However,-butadienecopolymers and neoprene are preferred.

It will be evident that the reinforcing elements may be either madeentirely of, glass or of any combination of other materials with glass.Thus, for example, textile cords'or fibers, plastic materials, or thelike may be combined with the glass.

The coverings may be cemented onto the rollers, or else they may be'madeof a slightly smaller diameter than that of the'rollers' so that thecoverings have to be stretched before mounting and are held in place bythe forces of resiliency.

It will be obvious that the-coverings of'my invention are highlyflexible and yet "have an excellent resistance to deformation stresses.They do not travel on the rollers during use but remain thereoninthe'position which they originally occupied when mounted. Due to thearrangement of glass fibrous materials in the neutral axis zone of thecoverings, heat which is created at either surface cannot be conveyed tothe opposite surface of the covering. It is also an important factorthat glass fibers are a relatively inexpensive material so that theincorporation of such elements hardly increases the cost of thecoverings while it considerably enhances their service life and quality.

' It. will: also be understood that while there have been describedherein certain specific embodiments of. my invention, it is not intendedthereby. tov have it J limited to or circumscribed by the specificdetails given in view of the fact that this invention is susceptible tovarious modificationsa-nd changes which come within the spiri-t-o f-thisdisclosure and the scope of the appended claims.

, 1- A "frubbermco er for t xtile ro s having an outerrubbertension'layer, an intermediate rubber neut al ax s'lay and aninner rubber qmpression' layer. and hav ng at least one aye of cablesbedded in said neutral axis layer, said cable being constructed of glasscords each of whichiis provided with a coatin of cushinn n and bondinmat rial.

2.241 rubber. cover for. textile rollers having an outerv rubber tensionlayer, an intermediate rubber neutral axis layer, and an innercompression' layer, andhaving at least one layer of cables embedded insaid neutral axis layer, said cables being .formed of cords which arebuilt from short staple glass fibers the ends of some of which projectbeyond said cables.

3. A rubber cover for textile rollers having an outer rubber tensionlayer, an intermediate rubber neutral axis layer, and an inner rubbercompression layer, said neutral axis layer being formed of rubber.material with a plurality ofla rs Qf la-ss fib rn ainin cabl embedded.her n. sa d, ca les in each l yer being a e in adjacent layers.

. ranged in staggered relationship with the .cables ABRAHAM L-FREEDLANDER.

BEF RE Q TE TIhe following references are of record in the file ofthispatent:

* uNrrEn STATES; PATENTS Number "Name Date 1,384,806 Reed Ju1y19, 19212,135,057 Sla'yter et al. Nov. 1, 1938 2,184,326 Thomas Dec. 26,19392,369,635 "Bacon Feb. 20, 1945 2,411,027 Crosby Nov. 12,1946

